Anthurium comtum Schott (1862: 87)

Hentz Júnior, Elmar J., Hammes, Janaine K., Camelo, Mel C., Coelho, Marcus A. N. & Temponi, Lívia G., 2021, Araceae from Serra do Brigadeiro State Park, Minas Gerais, Brazil, Phytotaxa 497 (3), pp. 229-246 : 234

Anthurium comtum Schott (1862: 87) ( Fig. 6 I-J).

Epiphyte. Stem erect. Cataphylls and prophylls brown to a straw-like shade, whole to slightly marcescent. Petiole 7.0– 7.8 cm long, green, abaxially obtuse, adaxially sulcate with acute angles, geniculum 0.3–2.9 cm long. Leaf-blade 15.9– 51.0 × 7.9 cm, green, strongly discolorous, erect to suberect or patent to the petiole, chartaceous, linear to lanceolate, rarely oblong, with a flat surface, often slightly narrowed at the base, base rarely cuneate, acute or attenuate, frequently obtuse, apex acute, acute-acuminate, rostrate, absence of glandular dots. Midrib adaxially green, abaxially yellowishgreen, obtuse to acute on both sides, primary lateral veins, engraved to slightly engraved adaxially, prominent to slightly prominent abaxially, 7–25 on both sides, secondary and tertiary veins reticulate, basal vein absent, collective veins leaving from the base of the blade or just above it, 0.5 cm distant from the margin. Inflorescence. Peduncle 33.0– 36.5 cm long, yellow when aged, greenish, vinaceous, terete. Spathe usually deciduous, when present up to 5 cm long. Spadix 13–14 cm long, homogeneous, gray-brown, conical, stipe 1–6 mm long, bisexual flowers, main spiral with 5–6 flowers; alternate spiral 7–8 flowers, green berries, 2 seeds.

Distribution: — Anthurium comtum is endemic to Brazil, occurring in Bahia, Espírito Santo, Minas Gerais, Rio de Janeiro, São Paulo, and Paraná ( Flora do Brasil 2020). It was found at the Matipó trail (northern PESB) and this is the first record of the species for this Park.

Ecology and phenology: —Typical species for Ombrophylous Forests, flowering throughout the year, with berries between November to April (Almeida et al. 2005; Coelho et al. 2009). In the PESB it was found with flowers in July. Also, it can be pointed out as rare for the Park, since only one individual was found, deep in the forest, in a fallen tree near a small stream.

Taxonomic notes: —Can be distinguished from other Anthurium species found in the PESB by its strongly discolorous leaf blade and its deciduous spathe.

Specimens examined: — BRAZIL. Parque Estadual da Serra do Brigadeiro, Minas Gerais: Pedra Bonita, Trilha Matipó , 4 Jul. 2019, fl., J . K . Hammes et al. 233 ( UNOP!) .

Additional specimens measured: — BRAZIL. Parque Nacional do Caparaó, Espírito Santo, Divino de São Lourenço, Limo Verde , trilha para a Pedra Escorada , 15 Nov. 2017, fl. e fr., M . C . Camelo et al. 24 ( RB!, UNOP!) .

Figures

FIGURE 6. Anthurium atrovinosum.A. Habit. B-D. Inflorescence details. Anthurium brigadeiroense. E. Habit. F-H. Inflorescence details. Anthurium comtum. I. Habit. J. Inflorescence. Anthurium lucioi. K. Habit. L. Inflorescence. Illustrations by Thaís Marcon.